Permanent-magnetic rotor structure of motor of shielding pump

Abstract

A permanent-magnetic rotor structure of a motor of a shielding pump comprises arched magnetic steel, a cast aluminum winding and a shielding sleeve. The arched magnetic steel is embedded into a rotor,the rotor is provided with the cast aluminum winding, the shielding sleeve is arranged outside the rotor, and the stainless steel shielding sleeve is provided with a diversion groove. According to the permanent-magnetic rotor structure of the motor of the shielding pump, a permanent magnet synchronous motor replaces a three-phase asynchronous motor, so that the efficiency of the motor is improvedto large extent; a permanent magnet is embedded with the arched magnetic steel, so that the torque of a magnetic pole of the permanent magnet fluctuates much narrowly; and the diversion grooves are designed in the external diameter of the rotor shielding sleeve, so that the flow of a heat radiation medium between a stator and the rotor can be increased, the heat radiation condition is improved, temperature rise of the motor is reduced, and the motor performance is improved.

Description

technical field [0001] The invention relates to the technical field of shielded electric pumps, in particular to a motor matched with the shielded electric pump. Background technique [0002] At present, the canned electric pumps used in domestic chemical plants all use three-phase asynchronous motors as supporting canned motors. For normal three-phase asynchronous canned motors, the rotors mostly use squirrel-cage cast aluminum rotors or copper bar rotors. Due to the rotating magnetic field of asynchronous motors and The existence of rotor slip will cause eddy current loss on the stator shielding sleeve, and the shielded pump produced by the three-phase asynchronous motor will generate eddy current loss in the shielding sleeve during operation, which will reduce the motor by 15%~20%. Efficiency, there is limited room for improvement in terms of product efficiency and power saving. [0003] In addition, the heating of the stator shield sleeve of the three-phase asynchronous...

AI Technical Summary

Problems solved by technology

[0002] At present, the canned electric pumps used in domestic chemical plants all use three-phase asynchronous motors as supporting canned motors. For normal three-phase asynchronous canned motors, the rotors mostly use squirrel-cage cast aluminum rotors or copper bar rotors. Due to the rotating magnetic field of asynchronous motors and The existence of rotor slip will cause eddy current loss on the stator shielding sleeve, and the shielded pump produced by the three-phase asynchronous motor will generate eddy current loss in the shielding sleeve during operation, which will reduce the motor by 15%~20%. Efficiency, there is limited room for improvement in terms of product efficiency and power saving

[0003] In addition, due to the heating of the stator shield sleeve of the three-phase asynchronous shielded motor, the temperature rise of the motor will be increased, which will affect the performance of the motor.

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